Switch



Jan, 11, 1924 11,479,24fi) E. N. JACOBH SWITCH Filed March 18, 1920 2 Sheets-Sheet )1 WITNESSES v #7 W7 MM 60? 9/101 Jan. 1 1924 1,479,240

' w E. N. JACOB] SWITCH Filed Marcg 18, 1920 2 Sheets-Sheet 2 1.9 in 18 i l 7 16 4O F 46 1 .1 'ill 22 21 v 25 20 4s 42 2O WITNESSES fQ/M Patented den. l, 1924.

UNHTED STATEg I 1.472 24% PATENT @FFECE.

EDWARD N. JACOBI, OI MILWACKEE, WISCONSIN, ASSIGNOR TO BRIGGS 8t STT'ION COMPANY, or minwnuxnn,

WISCONSIN, A CORPORATION OF WISCONSIN.

SWITCH.

Application filed March 18, 1920. Serial No. 366,863.

T all whom it may concern Be it known that I, EDWARD N. JAcoBI, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and a State of Wisconsin, have invented new and useful Improvements in Switches, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention relates to a switch for controlling electrical circuits and has for its object to provide a switch of the lock type with the parts so arranged as to be compact and inexpensive to manufacture, though be- 15 ing durable and efiicient and readily accessible. While a carbureter heating switch is chosen for the purpose of illustrating the invention, the invention is not limited there to or to any particular use as the features 20 thereof are capable of general use.

With the above and other objects in view the invention consists in the switch as herein claimed and all equivalents.

Referring to the accompanying drawings 25 in which like characters of reference indicate the same parts in diderent views:

Fig. l is a front view of a switch embodying this invention;

Fig. 2 is a rear View thereof;

Fig. 3 is a view showing the inner face of the terminal head;

Fig. 4c is a front view of the switch case with the front plate removed and parts sectioned;

Fig. 5 is a rear view with the terminal head and the retaining disk removed;

Fig. 6 is a rear sectional View;

Fi 7 is a transverse sectional view on the plane of line 77 of Fig. 6;

Fig. 8 is a similar view on line 8-8 of Figs. 5 and 6;

Fig. 9 is a top view of the contact ring;

Fig. 10 is a perspective view of the spider frame; and

45 Fig. 11 is a perspective view of the lock cylinder cup.

In these drawings 15 indicates a front plate having secured to its back a cupshaped switch case 16 as by means of rivets 17. Depressions in the switch case form pockets 18 between the switch case and the front late in which are contained nuts 19 to receive the threaded ends of bolts 20 which secure an insulating disk forming a terminal head 21 to the bottom of the switch 40 the plane of case, thus completing an enclosure for the.

switch parts. Projections 22 on the otherwise outwardly turned edge of the switch case fit in corresponding notches 23 in the edge of the terminal head to fix the position of the terminal head.

A lock cylinder cup 24,- shown in detail in Fig. 11,-is rigidly mounted partly within the switch enclosure and partly projecting through a central opening in the front plate. As shown, the oppositely extending arms thereof are held by some of the rivets 17 before mentioned. The cylindrical body portion of the part 24 has the arms 25 projecting at intermediate points with vertical slots 26 beneath the arms and with an in'turned flange 27 at its upper edge. It is the flanged end of the cup that protrudes through the opening in confined within the cup by said flange is a lock cylinder 28 having tumbler slides 29 adapted to project into the slots 26 to lock the switch or to be withdrawn within the lock cylinder by the action of the key 30 thereon in the well-known manner.

A spider frame 31, shown in detail in Figure 10, consists of a circular base and three upstanding curved projections arranged in cylindrical formation with outwardly extending flanges 32 on their ends. This spider frame is rigidly connected to the lock cylinder 28 so as to turn therewith. For this purpose a pair of lugs 33 are pressed upwardly from the bottom of the spider frame and fit within the key slot of the lock cylinder and a pair of screws 34 pass through.

the spider frame and are threaded into the end of the lock cylinder. The spider frame 31 is revolubly mounted within the switch case by having its flange 32 engaged by! hook shaped lugs 35 bent downfrom the end of the switch case in the manner best shown in Figs. 4, 6 and 8.

To limit the turning movements of the spider frame, which are caused by the turning of the key withdrawn within the cylinder, a stop lug 36 projects outwardly and downwardly from one of the flanges 32 and engages one of the lugs 35 in one extreme position and a stop lug 37 in the other extreme position, the stop lug 37 being bent down from the end of the switch case as shown in Figs. 6 and 7. One of the flanges 32 has its end bent down to form a curved lip 38 to prevent it the front plate and- 30 after the lock tumblers have of the spider frame 31 form key slots for .inwardly projecting key lugs 39 of an insulating ring 40 which surrounds the spider frame. This insulating. ring 40 consists of a disk of insulating material having a central opening to fit around the spider frame and is pressed downwardly by means of a coil spring 41 surrounding the spider frame and bearing at one end on the insulating disk and at the other end on the flanges 32. A disk 42 of larger diameter than the opening through the insulating disk is secured to the end of the spider frame by means of the screWs34, before mentioned, and serves to prevent the spring from forcing the insulating disk ofl of the spider frame when the terminal head 21 is not in place. In order to condense the structure the terminal head may be recessed to form a cavity 43 to contain the end of the spider frame.

A contact ring 44 is carried by the insulating ring 40 and is preferably of sheet metal with lugs 45 bent u therefrom and passing through openings in the insulating ring and then bent over upon the insulating ring in the manner shown in Figs. 8 and 9. This contact ring is provided with hemispherical projections or contacts 46 embossed therein or otherwise produced and adapted to bear on the surface of the terminal head with the pressure of spring 41 and to engage either in notches 47 in the face of the terminal head or in the recessed ends of contact studs 48 in the different positions of the switch. It is obvious that the arrangement of the contacts 46 and the 'contact studs will depend upon the purpose for which the switch is used and may be varied to suit the requirements, but the arrangement shown adapting the switch for use as a carbureter heatin switch, having the three positions indicated by the words Off, Heater and Flood on the front plate and in line with the key when the switch is in these various positions, is such that all three contacts 46 engage recesses 47 in the off position and engage contact studs marked Battery Heater in the heater position and engage contact studs marked Battery, Heater and Flood in the flood position. For convenience two of the contact studs are bound together by a connecting strip 49 and are marked Battery on the back of the terminal head, and two others are similarly bound together by aconnecting strip 50 and marked Heater, while a single con-- tact stud is marked Flood, as shown in Fig. 2. One of the contact studs in each of these groups constitutes a binding post with which wiring connection may be made.

It will be noticed that as far as possible and flooding and I a rence the metal parts are made up of sheet metal stampings, which are inexpensive to produce, and provision has been made for assembling in a convenient manner and still the switch is strong and durable and Without parts that will be likely to become broken or to get out of order, though they are readily accessible. Spring contacts are not employed but the contact ring is held firmly in engagement with the contact studs by the pressure of the coil spring.

It will be seen that in assembling the device, after the lock cylinder cup 24, the switch case 16 and the front plate 15 are riveted together by the rivets 17, the lock cylinder 28 may be slipped into the cup 24 from the rear and then .the spider frame 31 may be placed in position b I entering the hooks 35 through the slots between the sections of flange 32. As the stop lock 37 is at this time bent out of the of the stop lug 36, as shown by dotted lines in Fig. 7, the spider frame may then be turned to the position shown the stop lug 37 may be bent to its normal position, shown in full lines in Fig. 7 where it will cooperate the stop lug 36 to limit the turning movements of the switch. The spring 41 may then be placed on the spider frame and then the contact insulator disk with its contact ring, and finally the retaining disk 42, and the screws 34 will hold the parts together. Then it is only necessary to mount the terminal head in place to complete the assembling operation. If preferred, the spider frame, the spring, the contact insulator disk and retaining disk may be assembled as a separate unit and inserted together in the manner indicated, there being suflicient play and yielding of the parts to permit of the lugs 33 riding on the unslotted portion of the end of the cylinder 28 during the turning of the spider frame until said lugs enter the key slot.

Of course, the invention is not limited to any particular use for the switch and various changes and alterations may be made without departing from the spirit and scope of the invention.

What I claim as new and by Letters Patent is:

1. In a switch, a turning member, an insulating ring surrounding the turning member and splined thereto, a sheet metal contact ring mounted on the insulating ring and having contact projections embossed therein, and a base having contacts engaged by the contact projections.

2. In a switch, a turning member, an in sulating ring surrounding the turning memher and splined thereto, a metal contact ring desire to secure path of travel in Fig. 6 and' having contact projections embossed therein therefrom and passthe insulating ring to secure the con- V tact ring to the insulating ring, and contacts engaged by the contact projections of the contact ring.

3. In a switch, a switch case, hooks cut from the end of the switch case and bent out of the plane thereof, a flanged cylindrical turning member mounted in the switch case by having its flange held between the said hooks and unbent portions of the end of the switch case, a spring pressed ring-shaped contact carrier surrounding the turnlng member and connected thereto, and contacts engaged by the contacts of the contact carrier.

4. In a switch, a switch case, hooks bent from the end thereof, a flanged cylindrical turning member with its flange fitting between the hooks and the unbent port-ion of the end of the switch case, there being openings in the flange to receive the hooks, a stop projection on the flange and a stop projection on the end of the switch case cooperating therewith to limit the movements of the turning member, a contact carrier mounted on the turning member, and contacts engaged by the contacts of the contact carrier.

5. In a switch, a cylindrical turning member, a lock cylinder mounted therein and spaced therefrom and provided with tum blers adapted to project into the space. between the turning memberand the lock cylinder, a stationary member fitting in the space between the lock cylinder and the turning member and provided with slots to receive the lock cylinder tumblers, a contact member carried by the turning member, and a contact engaged thereby.

6. In a switch, a cup-shaped turning member, a lock cylinder mounted therein and secured thereto with an annular space between them, said lock cylinder being provided with key controlled tumblers adapted to project into the annular space, a stationary member fitting in the annular space and provided with slots to receive the lock cylinder tumblers and provided with an inwardly extending flange engaging the end of the lock cylinder to take the end thrust thereof, contacts carried by the turning member, and contacts engaged thereby.

7. In a switch, a front plate, a cup-shaped switch case, a cylindrical member passing through central openings in the front plate and the end of the switch case and provided with arms riveted to the switch case and front plate and also provided with an inwardly turned flange at its front end and slots at its rear end, a lock cylinder fitting within the'cylindrical member and" against the flange thereof and provided with key controlled tumblers adapted to project into said slots, a flanged cup-shaped turning member surrounding the lock cylinder and the cylindrical member and secured to the end of the lock cylinder, hooks bent from the end of the switch case and engaging the flange of the turning member, a ring-shaped contact carrier surrounding the turning member and splined thereto, a spring surrounding the turning member, and bearing on the contact carrier, contacts on the contact carrier, a retaining disk secured to the end of the turning member to confine the contact carrier thereon, a terminal head secured to the open end of the switch case, and contacts carried thereby engaged by the contacts of the contact carrier.

8. In a switch, a switch case, hooks cut from the end'of the switch case and bent out of the plane thereof, a flanged cylindrical turning member mounted in the switch case by havin its flange held between the said hooks an switch case, a lock cylinder within the turning member and connected therewith for turning it, contacts carried by the turnin member, and stationary contacts engage thereby.

9. In a switch, a switch case, a cylindrical turning member mounted in the switch case, a lock cylinder within the turning member and secured thereto and provided with a key slot through it, lugs projecting from the bottom of the turning member and engaging in the key slot of the lock cylinder to form a driving connection between them, contacts carried by the turning member, and stationary contacts engaged thereby.

10. In a switch, a switch case having a front plate, a cylindrical member protruding from the front plate, a lock cylinder contained within the cylindrical member, a terminal head for closing the switch case and having a recess to receive the end of the lock cylinder, and contacts carried by the lock cylinder for engaging contacts on the terminal head.

11. In a switch having a front plate with an opening therethrough, a cylindrical member protruding through said opening andv provided with arms for connection with the front plate and having a. flange at its protruding end and slots at its other end, a lock cylinder contained within the cylindrical member with its end bearing against the flange thereof and having tumblers for engaging within the slots, and switch contacts carried by the lock cylinder.

12. In a switch, a switch case having a front plate with an opening therethrough, a stationary cylindrical member protrudin through the opening of the front Plate and provided with slots, a lock cylinder contained within the cylindrical member and having tumblers to engage said slots, and switch contactsca-rried by the lock cylinder.

13. In a switch, a switch case, a lock cylinder mounted therein, a cylindrical turnin member surrounding the lock cylinder an unbent portions of the end of the m cylinder,

secured thereto and provided with keyways, an insulating ring surrounding the cylindrical member and having key projections engaging in said keyways a spring surroundmg the cylindrical member and bearing on the insulating ring, contacts carried by the insulating ring, and stationary contacts engaged' thereby.

14:. In a switch, a suitably mounted lock a cylindrical member surrounding Ways, contacts carried by the insulating 15 ring, and contacts enga ed thereby.

In testimony Whereo l aiiix my signature.

EDWARD N. JAUOBI. 

